com_print_stmt(): Guido rightly points out that the stream expression in extended prints should only be evaluated once.  This patch plays stack games (documented!) to fix this.
com_print_stmt(): Guido rightly points out that the stream expression
in extended prints should only be evaluated once.  This patch plays
stack games (documented!) to fix this.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator